A great sequel to Starcraft
I've gone through the campaign mode once now, finished most of the challenges, and played some online play as well. So I can say that I enjoyed the story, it was shortish but that's alright since it has to be played over to try different paths out. The challenges are pretty sweet as well, and help you hone your skills. For those modes and the multi-player mode there are achievements which is a very nice improvement.
The multi-player isn't what I hoped it would be, after Warcraft III introduced heros to RTS I haven't enjoyed a RTS without that,, or at least units that rank up with experience. Besides that though starcraft II is much like its predecessor, with some new units, and without some old ones, and minor improvements. Starcraft one was pretty damn good though, so topping that is hard. Overall I'm very happy with this game, it's a good sign for RTS games to come!